Attachment for smart device



FIG. 1 is a perspective view of an attachment for smart device, according to a first embodiment of our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a perspective view of an attachment for smart device, according to a second embodiment of our new design;

FIG. 9 is a front view thereof;

FIG. 10 is a back view thereof;

FIG. 11 is a right view thereof;

FIG. 12 is a left view thereof;

FIG. 13 is a top view thereof; and,

FIG. 14 is a bottom view thereof.

The broken lines shown in the drawings depict environmental subject matter and form no part of the claimed design. 

CLAIM The ornamental design for an attachment for smart device, as shown and described. 